The price on them varies wildly, some are £229 upto £350. There’s also a seller on eBay selling reconditioned ones, wonder if they are from people returning them due to them getting hot on the outside.
There is the smart oven pro which retails around £229 and the smart oven airfryer I have, which is around £329 at most stores. I’d be wary of buying a recon one incase an inferior heating tube has been fitted.
The big benifit, is there is a lesser need to turn/shake food halfway throgh as you would with a draw type airfryer. Russel Hobbs and Tefal (I think) do similar airfryer oven ones at less half the price with various functions but, don’t look as prety and possibly not as higher wattage.